when i m logged in the first website, the article are taken from article_site1

when i m logged in the second website, the article are taken from article_site2

when i m logged in the second website, i m logged in the first website (vice versa)

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now i would like to do a view of an union of articles_site1 and articles_site2, in order to display information (like similar discusions for an article) taken from the union of the two tables

what is the best chose temporarytable or merge, i think it s temporarytable but i m not sure, my other problem is that fulltext is not supported on view,